假设students表中有主键scode列,score表中有外键sid列,sid列引用scode列来实施引用完整性约束,此时如果使用t-sql语句: update students set scode=‘001201’ where scode=‘01201’ 来更新students表的scode列,可能的运行结果是( )
【单选题】Jingqiu, the young heroine of the new Zhang Yimou movie Under the Hawthorn Tree, is a very innocent high school student, ______ love story set in ______ mid 1970s.
【简答题】阅读理解 A very new, young officer(军官) was at a station. He was on his way to visit his mother in another town, and he wanted to telephone her to tell her the time of this train, so that she could meet hi...
【简答题】阅读理解。 A very new, young officer(军官)was at a station. He was on his way to visit his mother in another town, and he wanted to telephone her to tell her the time of this train, so that she could meet hi...